| 摘要 |
Provided is a pile driver having a leader with improved rigidity and a suppressed weight increase. The leader is formed by connecting multiple leader members and is installed in the front part of a base machine to be able to undulate. The leader member, in which a main body (26) with a metal cylinder body is formed, has a ring shape or a disk shape metal reinforcing plate (31) that perpendicularly crosses the axis of the leader member therein. Multiple reinforcing plates are installed at a predetermined angle in the axial direction of the leader member. |
